Lec6 Flashcards
contaminants were transported
from the source by?
➢ surface water.
➢ groundwater.
➢ air.
transport can be described as?
➢ advection.
➢ diffusion.
➢ dispersion.
are the two types of diffusion that can be described. In both cases, there is random movement.
(Molecular diffusion) and (turbulent or eddy diffusion)
random motion of the media causes the chemical to mix.
turbulent or eddy diffusion
similar to turbulent diffusion except that there is a pattern to the media’s motion.
Dispersion
Chemicals can be transported atmospherically as?
• a gas.
• dissolved in atmospheric water.
• sorbed to aerosols and larger particles.
the residence time of a chemical in a specific environmental compartment.
Persistence
are the major mechanisms through which persistence is affected.
Abiotic and biotic degradation
are toxic chemicals that adversely affect human health and
the environment around the world.
Persistent organic pollutants (POPs)
The process through which the chemical is broken down by fragmentation or loss of some components of the molecule.
degradation
degradation steps and pathways depend on?
➢ chemical media.
➢ environmental media
➢ environmental properties of that compartment
described as degradation reactions
Abiotic reactions
described as degradates.
products
the process of increasing toxicity is called
activation + toxication
the process of decreasing toxicity is called activation
And toxication
T/F?
F, inactivation and detoxication
